examples.py

>>> print_related(words, 'spain')
britain, england, france, europe, germany, spanish, italy

>>> print_related(words, 'called')
termed, dubbed, named, referred, nicknamed, titled, described

>>> print_related(words, 'although')
though, however, but, whereas, while, since, Nevertheless

>>> print_related(words, 'arms')
legs, arm, weapons, coat, coats, armaments, hands

>>> print_related(words, 'roots')
root, origins, stems, beginnings, rooted, grass, traditions